UX32VD: Touchpad does not turn off when using keyboard fn-key combination, although indicator is shown

[RK]

After upgrading from Ubuntu 15.04 to ubuntu 15.10, I have noticed that using the laptop hotkey (I am using an Asus UX32VD ultrabook, and the hotkey combination is fn-F9) to turn off the touchpad does not work.

The indicator, a touchpad image with an X in the corner, does show up, and the indicator cycles correctly. However, this does not actually turn off the touchpad.

However, going into the Gnome settings ("Mouse & and Touchpad") and clicking the Touchpad to off does actually turn off the touchpad. Interestingly, if pressing the hotkey combination when having this window visible shows the "Off/On" key switching properly also in the window, but again, the touchpad still works when the indicator is in the Off position.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xserver-xorg-input-synaptics 1.8.2-1ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
BootLog:
 fsck from util-linux 2.26.2
 /dev/sdb1: clean, 342357/1957888 files, 3689712/7816650 blocks
CurrentDesktop: GNOME
Date: Tue Nov 3 11:16:01 2015
DistUpgraded: 2015-10-30 17:26:02,303 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
DpkgLog:

EcryptfsInUse: Yes
InstallationDate: Installed on 2015-10-09 (24 days ago)
InstallationMedia: It
MachineType: ASUSTeK COMPUTER INC. UX32VD
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=de278325-836b-410c-8064-531fd8307f4a ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-synaptics
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-10-30 (3 days ago)
dmi.bios.date: 01/29/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX32VD.214
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX32VD
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX32VD.214:bd01/29/2013:svnASUSTeKCOMPUTERINC.:pnUX32VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX32VD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Tue Nov 3 10:20:43 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 4931
 vendor CMN
xserver.version: 2:1.17.2-1ubuntu9